Relationship Between Mesostructure,Mechanical Behaviour and Damage of Cement Composites Under High-Pressure Confinement |
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Authors: | P Forquin A Arias R Zaera |
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Institution: | (1) Laboratory of Physics and Mechanics of Materials, UMR CNRS 75-54, University Paul Verlaine of Metz, Ile du Saulcy, 57045 Metz, cedex, France;(2) Department of Continuum Mechanics and Structural Analysis, University Carlos III of Madrid, Avda. de la Universidad 30, 28911 Leganés, Madrid, Spain |
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Abstract: | This work seeks to determine how the mesostructure of seven types of cement composites containing alumina particles or not
controls their deviatoric strength, compaction law, and damage under high-pressure of confinement. First, the method of analysis
of quasi-oedometric compression tests is presented. Accuracy of the method for concrete is discussed by means of numerical
simulations. The confined compression tests performed show the effects of adding ceramic aggregates. Furthermore, an application
of post-mortem analysis by infiltration technique of each specimen is presented, revealing a highly micro-cracked pattern
depending of the mesostructure of these materials. From these observations, a discussion is presented on the influence that
the addition of ceramic aggregates exerts on the confined behaviour of these composites. The tests showed a highly beneficial
effect of the presence of particles, on both the deviatoric strength and the compaction law of the concretes considered. |
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Keywords: | Mortar and concrete Ceramics Cracking Confined compression Pressure sensitivity |
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